Door mounting mechanism

ABSTRACT

One side edge of a door is bent into L-shaped configuration to oppose the inwardly bent portion of the peripheral flange of a housing. The free end of a resilient anchor plate is shaped into a C-shaped configuration to be received in the L-shaped side edge of the door in an interlocking relationship to clamp the side edge between the C-shaped free end and the inwardly bent portion of the peripheral flange.

ll United States Patent 1151 3%,91 Shibuya [4 1 9', 11972 54] D00 MOUNTING MECHANISM [56] References emu Inventor: Tadahiko Shibuya, Tokyo, Japan FOREIGN PATENTS 0R APPLICATIONS 1 Assignw Tamurfl Electric Works, Umlted, Tokyo, 1,142,017 2/1969 Great Britain ..220 3s Japan Primary Examiner-Kenneth Downey [22] 1970 Attorney-Chittick, Pfund, Birch, Samuels & Gauthier [2|] Appl. No.: 65,203

[57] ABSTRACT [30] Foreign Application Priority pm One side edge of a door is bent into L-shaped configuration to oppose the inwardly bent portion of the peripheral flange of 21 1969 Japan "44/65640 housing. The free end of a resilient anchor plate is shaped into a C-shaped configuration to be received in the L-shaped side [52] US. Cl. ..49/397 edge of the door in an interlocking relationship to clamp the [51] lm'cl "E05d'7/00 side edge between the C-shaped free end and the inwardly [58] Field of Search ..49/397, 386, 398, 400; 16/142; hem portion f he peripheral flange 2 Claims, 4 Druwlng Figures PKTENTEDMAY 9 I972 IO FIG.I

FIG. 2a

INVENTOR TADAHIKO SHIBU'YA zihd 54-4 BY W a ATTORNEY noon MOUNTING MECHANISM BACKGROUND OF THE INVENTION This invention relates to a housing or casing with a door and more particularly to an improved door mounting mechanism.

Generally because of its simple construction, easiness of mounting and low cost, the mechanism for mounting a door on a housing or casing takes the form of a hinge about which the door is rotated. However as the shaft of the hinge is located on the outside of the housing it is easy to remove the shaft and hence the door which is undesirable from the standpoint of crime. Moreover the exposed hinge greatly impairs the appearance of the housing.

SUMMARY OF THE INVENTION It is therefore an object of this invention to provide an improved mechanism for mounting a door on a housing which is simple in construction, is not exposed to the outside of the housing and hence does not impair the appearance and is simple to fabricate.

According to this invention there is provided a door mounting mechanism comprising a housing with its peripheral flange bent inwardly to form an opening, a door disposed in the opening, one side edge of the door being bent inwardly into substantially L-shaped configuration to oppose the inwardly bent portion of the peripheral flange, and a resilient anchor plate with one end secured to the inner wall of the housing, the free end of the anchor plate being shaped into generally C- shaped configuration to be received in an interlocking relationship in the L-shaped side edge to resiliently clamp the side edge between the free end and the inwardly bent portion of the peripheral flange.

BRIEF DESCRIPTION OF THE DRAWING In the accompanying drawing:

FIG. 1 shows a perspective view, partly in section, of a housing embodying this invention and FIGS. 2a, 2b and 2c are partial sectional views in reversed position of the housing shown in FIG. 1 to show successive steps of opening and closing the door.

DESCRIPTION OF THE PREFERRED EMBODIMENT Referring now to the accompanying drawing, a housing is provided with a front door 12. As can be noted from FIG. 1, the mechanism or hinge for mounting the door on the housing is completely concealed in the housing thus improving the appearance. The hinge cannot be reached for the purpose of destroying the door mounting mechanism. It is to be understood that the housing 10 is representative of any type of door frame in which a door with a hinge of the type described can be mounted.

As shown in FIGS. 2a, 2b and 2c, the inner ends of the peripheral flanges l4 and 16 of the housing which define a door opening extend inwardly to form flat sides 14a: and 16a and their extreme ends 14b and 1612 are bent at right angles to oppose each other. Opposite sides 12a and 12b of the door 12 are bent at approximately right angles to engage inwardly extending flat sides 14a and 160 respectively. The inner end of side 12b abuts against bent portion 16b and may be relieved to clear 16a upon opening as shown. Suitable locking means is used to lock the door in its closed position but since such locking means is well known and forms no part of this invention it is not shown in the drawing.

An anchor plate 20 of a suitable resilient metal is secured at its one end to the inner wall of the housing, the outer end 20a of the anchor plate being shaped into a letter C configuration. By disposing the C-shaped free end of the anchor plate to reside in the corner formed by the edge of the door and the L- shaped member 12a, the first part 12a of the L-shaped member is resiliently clamped between the C-shaped free end 20a and the inwardly extending flat side 14a of the peripheral flange 14 by the biasing force of the anchor plate 20 normally acting in the direction of A.

When the door is opened in the direction of arrow B as shown in FIG. 2b by a suitable handle not shown, the door is rotated about the C-shaped portion of the anchor plate with its side corner 12c gradually sliding inwardly along the inner surface of the inwardly extending flat side 14a. During this movement two side corners 20b and 20c of the C-shaped free end 20a also slide along the inner surface of the L-shaped side edge of the door to move the free end 20a in the direction of arrow C against the bias of the anchor plate 20 until finally the door is rotated to the opened position as shown in FIG. 20. The bent end 14b of the inwardly extending flat side portion 14a acts as a stop to hold the door in its opened condition which is held by the clamping force exerted between the C- shaped free end 20a and inwardly extending flat side 14a. To close the door, the operation is reversed. The door does not move laterally beyond its original position against flat side 14:: and its extent, when opened, beyond the face I4 of the door frame is diminished an amount equal to the width of the flat side 14a. The construction permits the door to be fully opened in a space less than that required of other hinge constructions.

As above described not only during opening and closing operations but also under closed state one side edge of the door is always maintained in intimate contact with the inwardly bent portion of the peripheral flange and the free end of the anchor plate thus preventing leak of air or light which is one of the features of this invention.

The door mounting mechanism of this invention is completely concealed in the housing thus not only providing a neat appearance but also discouraging crime. Moreover, the anchor plate can be worked independently of the housing without requiring precise working and can be attached with machine screws 18.

It is to be understood that the configurations of the side edge of the door and the free end of the anchor plates are not limited to L and C shape but any other interlocking configurations may be substituted.

What is claimed is: I

1. Means mounting a door on a housing, in which said housing has an end wall and a front wall, said front wall having an opening therethrough and a flange extending inwardly along one side of said opening and parallel to said end wall, a door disposed in said opening, one side edge of said door extending inwardly to form a flat side at right angles to the face of said door and being parallel to said front wall flange, the inner edge of said flat side having a reversely turned flange that is parallel to said door face and at right angles to said front wall flange; and a resilient anchor plate, one end of said anchor plate being secured to the said end wall of said housing and the free end of said anchor plate being formed into a generally C-shaped portion having a first part engaging the interior face of said door,

a second part parallel to said front wall flange and said flat side of said door, said C-shaped portion lying between said door and said reversely turned flange, said C-shaped portion of said anchor plate resiliently clamping said flat side of said door against said front wall flange, the dimension of said C-shaped portion of said anchor plate being such that when said door is opened, 'the inner faces of said door and said flat side will be engaged by said C-shaped portion along shifting parallel lines of contact and the C-shaped portion will urge the intersection of said door and its flat side against said front wall flange along an inwardly shifting line of contact until said door has moved through 90 and the end portion of said door adjacent said flat side is held between said front wall flange and said C-shaped portion.

2. A door hinge connecting a door to a housing, said hinge comprising a fixed side wall having an inner flat side at right angle to the face of the door; an L-shaped member extending away from the face of the door at its edge with the first part of said member abutting said flat side and the second part of said member extending away from said flat side, said L-shaped member and the adjacent part of said door forming a comer; a resilient anchor plate having one end secured to the side wall remote from said flat side and having its other end generally in the form of a C portion fitting within the corner formed by said flat side as opening progresses whereby lateral movement of the door beyond its closed position in the direction away from said anchor plate is precluded and whereby the dimension of the door, when opened, beyond said housing is less than the width of the door when closed. 

1. Means mounting a door on a housing, in which said housing has an end wall and a front wall, said front wall having an opening therethrough and a flange extending inwardly along one side of said opening and parallel to said end wall, a door disposed in said opening, one side edge of said door extending inwardly to form a flat side at right angles to the face of said door and being parallel to said front wall flange, the inner edge of said flat side having a reversely turned flange that is parallel to said door face and at right angles to said front wall flange; and a resilient anchor plate, one end of said anchor plate being secured to the said end wall of said housing and the free end of said anchor plate being formed into a generally C-shaped portion having a first part engaging the interior face of said door, a second part parallel to said front wall flange and said flat side of said door, said C-shaped portion lying between said door and said reversely turned flange, said C-shaped portion of said anchor plate resiliently clamping said Flat side of said door against said front wall flange, the dimension of said C-shaped portion of said anchor plate being such that when said door is opened, the inner faces of said door and said flat side will be engaged by said C-shaped portion along shifting parallel lines of contact and the C-shaped portion will urge the intersection of said door and its flat side against said front wall flange along an inwardly shifting line of contact until said door has moved through 90* and the end portion of said door adjacent said flat side is held between said front wall flange and said C-shaped portion.
 2. A door hinge connecting a door to a housing, said hinge comprising a fixed side wall having an inner flat side at right angle to the face of the door; an L-shaped member extending away from the face of the door at its edge with the first part of said member abutting said flat side and the second part of said member extending away from said flat side, said L-shaped member and the adjacent part of said door forming a corner; a resilient anchor plate having one end secured to the side wall remote from said flat side and having its other end generally in the form of a C portion fitting within the corner formed by said door and said L-shaped member, the said plate acting through said C portion to hold the first part of said L-shaped member normally against said flat side; said door when opened, pivoting about said C portion and the edge of said door engaging said flat side and remaining at all times within the confines of said fixed side wall and moving inwardly along said flat side as opening progresses whereby lateral movement of the door beyond its closed position in the direction away from said anchor plate is precluded and whereby the dimension of the door, when opened, beyond said housing is less than the width of the door when closed. 